Yamaha RX-V361 component input HELP

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Just registered at AVForums, could anyone help on the following: Have connected Sky+ to my Yamaha RX-V361 via scart to component cable and then using component out from the Yamaha to compoenent in the my TV. The Yamaha does not seem to pick up the compenent signal from the Sky+ box. I have my Xbox 360 connected via the component input and that works fine.

Any ideas?
PS the digital audio out from the Sky+ to the Yamaha is working OK.